CH-298
Metals and alloys
Chemistry · Secondary 3 · Medium · Metals and alloys
Which statement correctly explains why brass (an alloy of copper and zinc) is harder than pure copper?
- Zinc atoms form covalent bonds with copper atoms.
- Zinc atoms increase the number of free electrons.
- Zinc atoms stop the layers of copper atoms from sliding easily.
- Zinc atoms remove the sea of electrons from the lattice.
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